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// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.0;

import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import {UUPSUpgradeable} from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import {ReentrancyGuardUpgradeable} from "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import {PausableUpgradeable} from "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {AddressAliasHelper} from "./zksync/l1-contracts/vendor/AddressAliasHelper.sol";
import {IZkLink} from "./interfaces/IZkLink.sol";
import {IL2Gateway} from "./interfaces/IL2Gateway.sol";
import {IMailbox, TxStatus} from "./zksync/l1-contracts/zksync/interfaces/IMailbox.sol";
import {IAdmin} from "./zksync/l1-contracts/zksync/interfaces/IAdmin.sol";
import {IZkSync} from "./zksync/l1-contracts/zksync/interfaces/IZkSync.sol";
import {Merkle} from "./zksync/l1-contracts/zksync/libraries/Merkle.sol";
import {TransactionValidator} from "./zksync/l1-contracts/zksync/libraries/TransactionValidator.sol";
import {L2Log, L2Message, PubdataPricingMode, FeeParams, SecondaryChainSyncStatus} from "./zksync/l1-contracts/zksync/Storage.sol";
import {UncheckedMath} from "./zksync/l1-contracts/common/libraries/UncheckedMath.sol";
import {UnsafeBytes} from "./zksync/l1-contracts/common/libraries/UnsafeBytes.sol";
import {REQUIRED_L2_GAS_PRICE_PER_PUBDATA, MAX_NEW_FACTORY_DEPS, L1_GAS_PER_PUBDATA_BYTE, L2_L1_LOGS_TREE_DEFAULT_LEAF_HASH} from "./zksync/l1-contracts/zksync/Config.sol";
import {L2_TO_L1_MESSENGER_SYSTEM_CONTRACT_ADDR, L2_BOOTLOADER_ADDRESS, L2_ETH_TOKEN_SYSTEM_CONTRACT_ADDR} from "./zksync/l1-contracts/common/L2ContractAddresses.sol";
import {IGetters} from "./zksync/l1-contracts/zksync/interfaces/IGetters.sol";

/// @title ZkLink contract
/// @author zk.link
contract ZkLink is
    IZkLink,
    IMailbox,
    IAdmin,
    IGetters,
    OwnableUpgradeable,
    UUPSUpgradeable,
    ReentrancyGuardUpgradeable,
    PausableUpgradeable
{
    using UncheckedMath for uint256;

    /// @dev The forward request type hash
    bytes32 public constant FORWARD_REQUEST_TYPE_HASH =
        keccak256(
            "ForwardL2Request(address gateway,bool isContractCall,address sender,uint256 txId,address contractAddressL2,uint256 l2Value,bytes32 l2CallDataHash,uint256 l2GasLimit,uint256 l2GasPricePerPubdata,bytes32 factoryDepsHash,address refundRecipient)"
        );

    /// @dev The length of withdraw message sent to secondary chain
    uint256 private constant L2_WITHDRAW_MESSAGE_LENGTH = 108;

    /// @dev Whether eth is the gas token
    bool public immutable IS_ETH_GAS_TOKEN;

    /// @notice The gateway is used for communicating with L1
    IL2Gateway public gateway;
    /// @notice List of permitted validators
    mapping(address validatorAddress => bool isValidator) public validators;
    /// @dev The white list allow to send request L2 request
    mapping(address contractAddress => bool isPermitToSendL2Request) public allowLists;
    /// @dev Gas price of primary chain
    uint256 public txGasPrice;
    /// @dev Fee params used to derive gasPrice for the L1->L2 transactions. For L2 transactions,
    /// the bootloader gives enough freedom to the operator.
    FeeParams public feeParams;
    /// @dev The total number of priority operations that were added to the priority queue
    uint256 public totalPriorityTxs;
    /// @dev The total number of synced priority operations
    uint256 public totalSyncedPriorityTxs;
    /// @dev The sync status for each priority operation
    mapping(uint256 priorityOpId => SecondaryChainSyncStatus) public priorityOpSyncStatus;
    /// @notice Total number of executed batches i.e. batches[totalBatchesExecuted] points at the latest executed batch
    /// (batch 0 is genesis)
    uint256 public totalBatchesExecuted;
    /// @dev Stored root hashes of L2 -> L1 logs
    mapping(uint256 batchNumber => bytes32 l2LogsRootHash) public l2LogsRootHashes;
    /// @dev Stored the l2 tx hash map from secondary chain to primary chain
    mapping(bytes32 l2TxHash => bytes32 primaryChainL2TxHash) public l2TxHashMap;
    /// @dev The total forward fee payed to validator
    uint256 public totalValidatorForwardFee;
    /// @dev The total forward fee withdrawn by validator
    uint256 public totalValidatorForwardFeeWithdrawn;
    /// @dev A mapping L2 batch number => message number => flag.
    /// @dev The L2 -> L1 log is sent for every withdrawal, so this mapping is serving as
    /// a flag to indicate that the message was already processed.
    /// @dev Used to indicate that eth withdrawal was already processed
    mapping(uint256 l2BatchNumber => mapping(uint256 l2ToL1MessageNumber => bool isFinalized))
        public isEthWithdrawalFinalized;
    /// @dev The forward fee allocator
    address public forwardFeeAllocator;
    /// @dev The range batch root hash of [fromBatchNumber, toBatchNumber]
    /// The key is keccak256(abi.encodePacked(fromBatchNumber, toBatchNumber))
    mapping(bytes32 range => bytes32 rangeBatchRootHash) public rangeBatchRootHashes;
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;

    /// @notice Gateway init
    event InitGateway(IL2Gateway indexed gateway);
    /// @notice Contract's permit status changed
    event ContractAllowStatusUpdate(address indexed contractAddress, bool isPermit);
    /// @notice Tx gas price changed
    event TxGasPriceUpdate(uint256 oldTxGasPrice, uint256 newTxGasPrice);
    /// @notice Validator's status changed
    event ValidatorStatusUpdate(address indexed validatorAddress, bool isActive);
    /// @notice Fee params for L1->L2 transactions changed
    event NewFeeParams(FeeParams oldFeeParams, FeeParams newFeeParams);
    /// @notice New priority request event. Emitted when a request is placed into the priority queue
    event NewPriorityRequest(uint256 priorityOpId, ForwardL2Request l2Request);
    /// @notice Emitted send sync status to primary chain.
    event SyncL2Requests(uint256 totalSyncedPriorityTxs, bytes32 syncHash, uint256 forwardEthAmount);
    /// @notice Emitted when receive batch root from primary chain.
    event SyncBatchRoot(uint256 batchNumber, bytes32 l2LogsRootHash, uint256 forwardEthAmount);
    /// @notice Emitted when receive range batch root hash from primary chain.
    event SyncRangeBatchRoot(
        uint256 fromBatchNumber,
        uint256 toBatchNumber,
        bytes32 rangeBatchRootHash,
        uint256 forwardEthAmount
    );
    /// @notice Emitted when open range batch root hash.
    event OpenRangeBatchRoot(uint256 fromBatchNumber, uint256 toBatchNumber);
    /// @notice Emitted when receive l2 tx hash from primary chain.
    event SyncL2TxHash(bytes32 l2TxHash, bytes32 primaryChainL2TxHash);
    /// @notice Emitted when validator withdraw forward fee
    event WithdrawForwardFee(address indexed receiver, uint256 amount);
    /// @notice Emitted when the withdrawal is finalized on L1 and funds are released.
    /// @param to The address to which the funds were sent
    /// @param amount The amount of funds that were sent
    event EthWithdrawalFinalized(address indexed to, uint256 amount);
    /// @notice Forward fee allocator changed
    event ForwardFeeAllocatorUpdate(address oldAllocator, address newAllocator);

    /// @notice Check if msg sender is gateway
    modifier onlyGateway() {
        require(msg.sender == address(gateway), "Not gateway");
        _;
    }

    /// @notice Checks if validator is active
    modifier onlyValidator() {
        require(validators[msg.sender], "Not validator"); // validator is not active
        _;
    }

    /// @notice Checks if msg sender is forward fee allocator
    modifier onlyForwardFeeAllocator() {
        require(msg.sender == forwardFeeAllocator, "Not forward fee allocator");
        _;
    }

    constructor(bool _isEthGasToken) {
        IS_ETH_GAS_TOKEN = _isEthGasToken;
        _disableInitializers();
    }

    function initialize() external initializer {
        __Ownable_init_unchained();
        __UUPSUpgradeable_init_unchained();
        __ReentrancyGuard_init_unchained();
        __Pausable_init_unchained();
    }

    function _authorizeUpgrade(address newImplementation) internal override onlyOwner {
        // can only called by owner
    }

    /// @dev Pause the contract, can only be called by the owner
    function pause() external onlyOwner {
        _pause();
    }

    /// @dev Unpause the contract, can only be called by the owner
    function unpause() external onlyOwner {
        _unpause();
    }

    function getGateway() external view returns (IL2Gateway) {
        return gateway;
    }

    function getGovernor() external view returns (address) {
        return owner();
    }

    function getTotalBatchesExecuted() external view returns (uint256) {
        return totalBatchesExecuted;
    }

    function getTotalPriorityTxs() external view returns (uint256) {
        return totalPriorityTxs;
    }

    function isValidator(address _address) external view returns (bool) {
        return validators[_address];
    }

    function l2LogsRootHash(uint256 _batchNumber) external view returns (bytes32 merkleRoot) {
        return l2LogsRootHashes[_batchNumber];
    }

    function getPriorityTxMaxGasLimit() public pure returns (uint256) {
        return 72000000;
    }

    /// @dev Init gateway, can only be called by the owner
    function setGateway(IL2Gateway _gateway) external onlyOwner {
        require(address(gateway) == address(0), "Duplicate init gateway");
        require(address(_gateway) != address(0), "Invalid gateway");
        gateway = _gateway;
        emit InitGateway(_gateway);
    }

    /// @dev Update the permit status of contract, can only be called by the owner
    function setAllowList(address _contractAddress, bool _permitted) external onlyOwner {
        if (allowLists[_contractAddress] != _permitted) {
            allowLists[_contractAddress] = _permitted;
            emit ContractAllowStatusUpdate(_contractAddress, _permitted);
        }
    }

    /// @dev Update the tx gas price
    function setTxGasPrice(uint256 _newTxGasPrice) external onlyOwner {
        uint256 oldTxGasPrice = txGasPrice;
        if (oldTxGasPrice != _newTxGasPrice) {
            txGasPrice = _newTxGasPrice;
            emit TxGasPriceUpdate(oldTxGasPrice, _newTxGasPrice);
        }
    }

    function setValidator(address _validator, bool _active) external onlyGateway {
        if (validators[_validator] != _active) {
            validators[_validator] = _active;
            emit ValidatorStatusUpdate(_validator, _active);
        }
    }

    /// @dev https://github.com/matter-labs/era-contracts/blob/e0a33ce73c4decd381446a6eb812b14c2ff69c47/l1-contracts/contracts/zksync/facets/Admin.sol#L88
    function changeFeeParams(FeeParams calldata _newFeeParams) external onlyGateway {
        // Double checking that the new fee params are valid, i.e.
        // the maximal pubdata per batch is not less than the maximal pubdata per priority transaction.
        require(_newFeeParams.maxPubdataPerBatch >= _newFeeParams.priorityTxMaxPubdata, "n6");

        FeeParams memory oldFeeParams = feeParams;
        feeParams = _newFeeParams;

        emit NewFeeParams(oldFeeParams, _newFeeParams);
    }

    /// @dev Update the forward fee allocator
    function setForwardFeeAllocator(address _newForwardFeeAllocator) external onlyOwner {
        require(_newForwardFeeAllocator != address(0), "Invalid allocator");
        address oldAllocator = forwardFeeAllocator;
        if (oldAllocator != _newForwardFeeAllocator) {
            forwardFeeAllocator = _newForwardFeeAllocator;
            emit ForwardFeeAllocatorUpdate(oldAllocator, _newForwardFeeAllocator);
        }
    }

    function l2TransactionBaseCost(
        uint256 _gasPrice,
        uint256 _l2GasLimit,
        uint256 _l2GasPerPubdataByteLimit
    ) public view returns (uint256) {
        uint256 l2GasPrice = _deriveL2GasPrice(_gasPrice, _l2GasPerPubdataByteLimit);
        return l2GasPrice * _l2GasLimit;
    }

    function requestL2Transaction(
        address _contractL2,
        uint256 _l2Value,
        bytes calldata _calldata,
        uint256 _l2GasLimit,
        uint256 _l2GasPerPubdataByteLimit,
        bytes[] calldata _factoryDeps,
        address _refundRecipient
    ) external payable nonReentrant whenNotPaused returns (bytes32 canonicalTxHash) {
        // Disable l2 value if eth is not the gas token
        if (!IS_ETH_GAS_TOKEN) {
            require(_l2Value == 0, "Not allow l2 value");
        }
        // Change the sender address if it is a smart contract to prevent address collision between L1 and L2.
        // Please note, currently zkSync address derivation is different from Ethereum one, but it may be changed in the future.
        address sender = msg.sender;
        bool isContractCall = false;
        // solhint-disable-next-line avoid-tx-origin
        if (sender != tx.origin) {
            // Check contract call is allowed for safe reasons
            require(allowLists[sender], "Not allow to send L2 request");
            sender = AddressAliasHelper.applyL1ToL2Alias(msg.sender);
            isContractCall = true;
        } else {
            // Temporarily prohibit contract calls from EOA address for safe reasons
            require(_calldata.length == 0, "Not allow to call contract");
        }

        // Enforcing that `_l2GasPerPubdataByteLimit` equals to a certain constant number. This is needed
        // to ensure that users do not get used to using "exotic" numbers for _l2GasPerPubdataByteLimit, e.g. 1-2, etc.
        // VERY IMPORTANT: nobody should rely on this constant to be fixed and every contract should give their users the ability to provide the
        // ability to provide `_l2GasPerPubdataByteLimit` for each independent transaction.
        // CHANGING THIS CONSTANT SHOULD BE A CLIENT-SIDE CHANGE.
        require(_l2GasPerPubdataByteLimit == REQUIRED_L2_GAS_PRICE_PER_PUBDATA, "Invalid l2GasPerPubdataByteLimit");
        require(_factoryDeps.length <= MAX_NEW_FACTORY_DEPS, "Invalid factoryDeps");

        // Checking that the user provided enough ether to pay for the transaction.
        uint256 l2GasPrice = _deriveL2GasPrice(txGasPrice, _l2GasPerPubdataByteLimit);
        uint256 baseCost = l2GasPrice * _l2GasLimit;
        require(msg.value == baseCost + _l2Value, "Invalid msg value"); // The `msg.value` doesn't cover the transaction cost
        totalValidatorForwardFee = totalValidatorForwardFee + baseCost;

        // If the `_refundRecipient` is not provided, we use the `sender` as the recipient.
        address refundRecipient = _refundRecipient == address(0) ? sender : _refundRecipient;
        // If the `_refundRecipient` is a smart contract, we apply the L1 to L2 alias to prevent foot guns.
        if (refundRecipient.code.length > 0) {
            refundRecipient = AddressAliasHelper.applyL1ToL2Alias(refundRecipient);
        }

        // Build l2 request params
        uint256 _totalPriorityTxs = totalPriorityTxs;
        ForwardL2Request memory request = ForwardL2Request(
            gateway.getRemoteGateway(),
            isContractCall,
            sender,
            _totalPriorityTxs,
            _contractL2,
            _l2Value,
            _calldata,
            _l2GasLimit,
            _l2GasPerPubdataByteLimit,
            _factoryDeps,
            refundRecipient
        );
        // Validate l2 transaction
        {
            L2CanonicalTransaction memory transaction = _serializeL2Transaction(request);
            bytes memory transactionEncoding = abi.encode(transaction);
            TransactionValidator.validateL1ToL2Transaction(
                transaction,
                transactionEncoding,
                getPriorityTxMaxGasLimit(),
                feeParams.priorityTxMaxPubdata
            );
        }
        canonicalTxHash = hashForwardL2Request(request);

        // Accumulate sync status
        SecondaryChainSyncStatus memory syncStatus;
        if (_totalPriorityTxs == 0) {
            syncStatus.hash = canonicalTxHash;
            syncStatus.amount = _l2Value;
        } else {
            syncStatus = priorityOpSyncStatus[_totalPriorityTxs - 1];
            syncStatus.hash = keccak256(abi.encodePacked(syncStatus.hash, canonicalTxHash));
            syncStatus.amount = syncStatus.amount + _l2Value;
        }
        priorityOpSyncStatus[_totalPriorityTxs] = syncStatus;
        totalPriorityTxs = _totalPriorityTxs + 1;

        emit NewPriorityRequest(request.txId, request);
    }

    function finalizeEthWithdrawal(
        uint256 _l2BatchNumber,
        uint256 _l2MessageIndex,
        uint16 _l2TxNumberInBatch,
        bytes calldata _message,
        bytes32[] calldata _merkleProof
    ) external nonReentrant {
        require(IS_ETH_GAS_TOKEN, "Not allow eth withdraw");
        require(!isEthWithdrawalFinalized[_l2BatchNumber][_l2MessageIndex], "jj");

        L2Message memory l2ToL1Message = L2Message({
            txNumberInBatch: _l2TxNumberInBatch,
            sender: L2_ETH_TOKEN_SYSTEM_CONTRACT_ADDR,
            data: _message
        });

        (address _l1Gateway, uint256 _amount, address _l1WithdrawReceiver) = _parseL2WithdrawalMessage(_message);
        require(_l1Gateway == gateway.getRemoteGateway(), "rg");

        bool proofValid = proveL2MessageInclusion(_l2BatchNumber, _l2MessageIndex, l2ToL1Message, _merkleProof);
        require(proofValid, "pi"); // Failed to verify that withdrawal was actually initialized on L2

        isEthWithdrawalFinalized[_l2BatchNumber][_l2MessageIndex] = true;
        _withdrawFunds(_l1WithdrawReceiver, _amount);

        emit EthWithdrawalFinalized(_l1WithdrawReceiver, _amount);
    }

    function proveL2MessageInclusion(
        uint256 _batchNumber,
        uint256 _index,
        L2Message memory _message,
        bytes32[] calldata _proof
    ) public view returns (bool) {
        return _proveL2LogInclusion(_batchNumber, _index, _L2MessageToLog(_message), _proof);
    }

    function proveL1ToL2TransactionStatus(
        bytes32 _l2TxHash,
        uint256 _l2BatchNumber,
        uint256 _l2MessageIndex,
        uint16 _l2TxNumberInBatch,
        bytes32[] calldata _merkleProof,
        TxStatus _status
    ) public view returns (bool) {
        // Get l2 tx hash on primary chain
        bytes32 primaryChainL2TxHash = l2TxHashMap[_l2TxHash];
        require(primaryChainL2TxHash != bytes32(0), "Invalid l2 tx hash");

        // Bootloader sends an L2 -> L1 log only after processing the L1 -> L2 transaction.
        // Thus, we can verify that the L1 -> L2 transaction was included in the L2 batch with specified status.
        //
        // The semantics of such L2 -> L1 log is always:
        // - sender = L2_BOOTLOADER_ADDRESS
        // - key = hash(L1ToL2Transaction)
        // - value = status of the processing transaction (1 - success & 0 - fail)
        // - isService = true (just a conventional value)
        // - l2ShardId = 0 (means that L1 -> L2 transaction was processed in a rollup shard, other shards are not available yet anyway)
        // - txNumberInBatch = number of transaction in the batch
        L2Log memory l2Log = L2Log({
            l2ShardId: 0,
            isService: true,
            txNumberInBatch: _l2TxNumberInBatch,
            sender: L2_BOOTLOADER_ADDRESS,
            key: primaryChainL2TxHash,
            value: bytes32(uint256(_status))
        });
        return _proveL2LogInclusion(_l2BatchNumber, _l2MessageIndex, l2Log, _merkleProof);
    }

    function syncL2Requests(uint256 _newTotalSyncedPriorityTxs) external payable onlyValidator {
        // Check newTotalSyncedPriorityTxs
        require(
            _newTotalSyncedPriorityTxs <= totalPriorityTxs && _newTotalSyncedPriorityTxs > totalSyncedPriorityTxs,
            "Invalid sync point"
        );

        // Forward eth amount is the difference of two accumulate amount
        SecondaryChainSyncStatus memory lastSyncStatus;
        if (totalSyncedPriorityTxs > 0) {
            lastSyncStatus = priorityOpSyncStatus[totalSyncedPriorityTxs - 1];
        }
        SecondaryChainSyncStatus memory currentSyncStatus = priorityOpSyncStatus[_newTotalSyncedPriorityTxs - 1];
        uint256 forwardAmount = currentSyncStatus.amount - lastSyncStatus.amount;

        // Update synced priority txs
        totalSyncedPriorityTxs = _newTotalSyncedPriorityTxs;

        // Send sync status to L1 gateway
        bytes memory callData = abi.encodeCall(
            IZkSync.syncL2Requests,
            (gateway.getRemoteGateway(), _newTotalSyncedPriorityTxs, currentSyncStatus.hash, forwardAmount)
        );
        gateway.sendMessage{value: msg.value + forwardAmount}(forwardAmount, callData);

        emit SyncL2Requests(_newTotalSyncedPriorityTxs, currentSyncStatus.hash, forwardAmount);
    }

    function syncBatchRoot(
        uint256 _batchNumber,
        bytes32 _l2LogsRootHash,
        uint256 _forwardEthAmount
    ) external payable onlyGateway {
        require(msg.value == _forwardEthAmount, "Invalid forward amount");
        // Allows repeated sending of the forward amount of the batch
        if (_batchNumber > totalBatchesExecuted) {
            totalBatchesExecuted = _batchNumber;
        }
        l2LogsRootHashes[_batchNumber] = _l2LogsRootHash;
        emit SyncBatchRoot(_batchNumber, _l2LogsRootHash, _forwardEthAmount);
    }

    function syncRangeBatchRoot(
        uint256 _fromBatchNumber,
        uint256 _toBatchNumber,
        bytes32 _rangeBatchRootHash,
        uint256 _forwardEthAmount
    ) external payable onlyGateway {
        require(_toBatchNumber >= _fromBatchNumber, "Invalid range");
        require(msg.value == _forwardEthAmount, "Invalid forward amount");
        bytes32 range = keccak256(abi.encodePacked(_fromBatchNumber, _toBatchNumber));
        rangeBatchRootHashes[range] = _rangeBatchRootHash;
        emit SyncRangeBatchRoot(_fromBatchNumber, _toBatchNumber, _rangeBatchRootHash, _forwardEthAmount);
    }

    /// @dev Unzip the root hashes in the range
    /// @param _fromBatchNumber The batch number from
    /// @param _toBatchNumber The batch number to
    /// @param _l2LogsRootHashes The l2LogsRootHash list in the range [`_fromBatchNumber`, `_toBatchNumber`]
    function openRangeBatchRootHash(
        uint256 _fromBatchNumber,
        uint256 _toBatchNumber,
        bytes32[] calldata _l2LogsRootHashes
    ) external onlyValidator {
        require(_toBatchNumber >= _fromBatchNumber, "Invalid range");
        bytes32 range = keccak256(abi.encodePacked(_fromBatchNumber, _toBatchNumber));
        bytes32 rangeBatchRootHash = rangeBatchRootHashes[range];
        require(rangeBatchRootHash != bytes32(0), "Range batch root hash not exist");
        uint256 rootHashesLength = _l2LogsRootHashes.length;
        require(rootHashesLength == _toBatchNumber - _fromBatchNumber + 1, "Invalid root hashes length");
        bytes32 _rangeBatchRootHash = _l2LogsRootHashes[0];
        l2LogsRootHashes[_fromBatchNumber] = _rangeBatchRootHash;
        unchecked {
            for (uint256 i = 1; i < rootHashesLength; ++i) {
                bytes32 _l2LogsRootHash = _l2LogsRootHashes[i];
                l2LogsRootHashes[_fromBatchNumber + i] = _l2LogsRootHash;
                _rangeBatchRootHash = Merkle._efficientHash(_rangeBatchRootHash, _l2LogsRootHash);
            }
        }
        require(_rangeBatchRootHash == rangeBatchRootHash, "Incorrect root hash");
        delete rangeBatchRootHashes[range];
        if (_toBatchNumber > totalBatchesExecuted) {
            totalBatchesExecuted = _toBatchNumber;
        }
        emit OpenRangeBatchRoot(_fromBatchNumber, _toBatchNumber);
    }

    function syncL2TxHash(bytes32 _l2TxHash, bytes32 _primaryChainL2TxHash) external onlyGateway {
        l2TxHashMap[_l2TxHash] = _primaryChainL2TxHash;
        emit SyncL2TxHash(_l2TxHash, _primaryChainL2TxHash);
    }

    function withdrawForwardFee(address _receiver, uint256 _amount) external nonReentrant onlyForwardFeeAllocator {
        require(_amount > 0, "Invalid amount");
        uint256 newWithdrawnFee = totalValidatorForwardFeeWithdrawn + _amount;
        require(totalValidatorForwardFee >= newWithdrawnFee, "Withdraw exceed");

        // Update withdrawn fee
        totalValidatorForwardFeeWithdrawn = newWithdrawnFee;
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = _receiver.call{value: _amount}("");
        require(success, "Withdraw failed");
        emit WithdrawForwardFee(_receiver, _amount);
    }

    /// @notice Derives the price for L2 gas in ETH to be paid.
    /// @dev https://github.com/matter-labs/era-contracts/blob/e0a33ce73c4decd381446a6eb812b14c2ff69c47/l1-contracts/contracts/zksync/facets/Mailbox.sol#L147
    /// @param _l1GasPrice The gas price on L1.
    /// @param _gasPerPubdata The price for each pubdata byte in L2 gas
    /// @return The price of L2 gas in ETH
    function _deriveL2GasPrice(uint256 _l1GasPrice, uint256 _gasPerPubdata) internal view returns (uint256) {
        FeeParams memory _feeParams = feeParams;

        uint256 pubdataPriceETH;
        if (_feeParams.pubdataPricingMode == PubdataPricingMode.Rollup) {
            pubdataPriceETH = L1_GAS_PER_PUBDATA_BYTE * _l1GasPrice;
        }

        uint256 batchOverheadETH = uint256(_feeParams.batchOverheadL1Gas) * _l1GasPrice;
        uint256 fullPubdataPriceETH = pubdataPriceETH + batchOverheadETH / uint256(_feeParams.maxPubdataPerBatch);

        uint256 l2GasPrice = _feeParams.minimalL2GasPrice + batchOverheadETH / uint256(_feeParams.maxL2GasPerBatch);
        uint256 minL2GasPriceETH = (fullPubdataPriceETH + _gasPerPubdata - 1) / _gasPerPubdata;

        return Math.max(l2GasPrice, minL2GasPriceETH);
    }

    function _serializeL2Transaction(
        ForwardL2Request memory _request
    ) internal pure returns (L2CanonicalTransaction memory transaction) {
        transaction = L2CanonicalTransaction({
            txType: uint256(0),
            from: uint256(0),
            to: uint256(0),
            gasLimit: _request.l2GasLimit, // Used in validate l2 transaction
            gasPerPubdataByteLimit: _request.l2GasPricePerPubdata, // Used in validate l2 transaction
            maxFeePerGas: uint256(0),
            maxPriorityFeePerGas: uint256(0),
            paymaster: uint256(0),
            nonce: uint256(0),
            value: uint256(0),
            reserved: [uint256(0), uint256(0), uint256(0), uint256(0)],
            data: _request.l2CallData, // Length used in validate l2 transaction
            signature: new bytes(0),
            factoryDeps: new uint256[](_request.factoryDeps.length), // Length used in validate l2 transaction
            paymasterInput: new bytes(0),
            reservedDynamic: new bytes(0)
        });
    }

    /// @dev Convert arbitrary-length message to the raw l2 log
    function _L2MessageToLog(L2Message memory _message) internal pure returns (L2Log memory) {
        return
            L2Log({
                l2ShardId: 0,
                isService: true,
                txNumberInBatch: _message.txNumberInBatch,
                sender: L2_TO_L1_MESSENGER_SYSTEM_CONTRACT_ADDR,
                key: bytes32(uint256(uint160(_message.sender))),
                value: keccak256(_message.data)
            });
    }

    /// @dev Prove that a specific L2 log was sent in a specific L2 batch number
    function _proveL2LogInclusion(
        uint256 _batchNumber,
        uint256 _index,
        L2Log memory _log,
        bytes32[] calldata _proof
    ) internal view returns (bool) {
        require(_batchNumber <= totalBatchesExecuted, "xx");

        bytes32 hashedLog = keccak256(
            abi.encodePacked(_log.l2ShardId, _log.isService, _log.txNumberInBatch, _log.sender, _log.key, _log.value)
        );
        // Check that hashed log is not the default one,
        // otherwise it means that the value is out of range of sent L2 -> L1 logs
        require(hashedLog != L2_L1_LOGS_TREE_DEFAULT_LEAF_HASH, "tw");

        // It is ok to not check length of `_proof` array, as length
        // of leaf preimage (which is `L2_TO_L1_LOG_SERIALIZE_SIZE`) is not
        // equal to the length of other nodes preimages (which are `2 * 32`)

        bytes32 calculatedRootHash = Merkle.calculateRoot(_proof, _index, hashedLog);
        bytes32 actualRootHash = l2LogsRootHashes[_batchNumber];

        return actualRootHash == calculatedRootHash;
    }

    /// @dev Decode the withdraw message that came from L2
    function _parseL2WithdrawalMessage(
        bytes memory _message
    ) internal pure returns (address l1Gateway, uint256 amount, address l1Receiver) {
        // We check that the message is long enough to read the data.
        // Please note that there are two versions of the message:
        // 1. The message that is sent by `withdraw(address _l1Receiver)`
        // It should be equal to the length of the bytes4 function signature + address l1Receiver + uint256 amount = 4 + 20 + 32 = 56 (bytes).
        // 2. The message that is sent by `withdrawWithMessage(address _l1Receiver, bytes calldata _additionalData)`
        // It should be equal to the length of the following:
        // bytes4 function signature + address l1Gateway + uint256 amount + address l2Sender + bytes _additionalData
        // (where the _additionalData = abi.encode(l1Receiver))
        // = 4 + 20 + 32 + 20 + 32 == 108 (bytes).
        require(_message.length == L2_WITHDRAW_MESSAGE_LENGTH, "pm");

        (uint32 functionSignature, uint256 offset) = UnsafeBytes.readUint32(_message, 0);
        require(bytes4(functionSignature) == this.finalizeEthWithdrawal.selector, "is");

        (l1Gateway, offset) = UnsafeBytes.readAddress(_message, offset);
        (amount, offset) = UnsafeBytes.readUint256(_message, offset);
        // The additional data is l1 receiver address
        (l1Receiver, offset) = UnsafeBytes.readAddress(_message, offset + 32);
    }

    /// @notice Transfer ether from the contract to the receiver
    /// @dev Reverts only if the transfer call failed
    function _withdrawFunds(address _to, uint256 _amount) internal {
        bool callSuccess;
        // Low-level assembly call, to avoid any memory copying (save gas)
        assembly {
            callSuccess := call(gas(), _to, _amount, 0, 0, 0, 0)
        }
        require(callSuccess, "pz");
    }

    function hashForwardL2Request(ForwardL2Request memory _request) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    FORWARD_REQUEST_TYPE_HASH,
                    _request.gateway,
                    _request.isContractCall,
                    _request.sender,
                    _request.txId,
                    _request.contractAddressL2,
                    _request.l2Value,
                    keccak256(_request.l2CallData),
                    _request.l2GasLimit,
                    _request.l2GasPricePerPubdata,
                    keccak256(abi.encode(_request.factoryDeps)),
                    _request.refundRecipient
                )
            );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822ProxiableUpgradeable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC1967.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 *
 * _Available since v4.8.3._
 */
interface IERC1967Upgradeable {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeaconUpgradeable {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../interfaces/IERC1967Upgradeable.sol";
import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import {Initializable} from "../utils/Initializable.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 */
abstract contract ERC1967UpgradeUpgradeable is Initializable, IERC1967Upgradeable {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    function __ERC1967Upgrade_init() internal onlyInitializing {
    }

    function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            AddressUpgradeable.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data, bool forceCall) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            AddressUpgradeable.functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
        }
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import {Initializable} from "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 *
 * _Available since v4.1._
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
    address private immutable __self = address(this);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        require(address(this) != __self, "Function must be called through delegatecall");
        require(_getImplementation() == __self, "Function must be called through active proxy");
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
        _;
    }

    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
        return _IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeTo(address newImplementation) public virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) public payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data, true);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeTo} and {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal override onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    function __Pausable_init() internal onlyInitializing {
        __Pausable_init_unchained();
    }

    function __Pausable_init_unchained() internal onlyInitializing {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuardUpgradeable is Initializable {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
 * _Available since v4.9 for `string`, `bytes`._
 */
library StorageSlotUpgradeable {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.0;

interface IGateway {
    /// @return Remote gateway
    function getRemoteGateway() external view returns (address);
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.0;

import {IGateway} from "./IGateway.sol";

interface IL2Gateway is IGateway {
    /// @notice Emit when sending a message
    event L2GatewayMessageSent(uint256 value, bytes callData);

    /// @notice Send message to remote gateway
    /// @param _value The msg value
    /// @param _callData The call data
    function sendMessage(uint256 _value, bytes calldata _callData) external payable;
}

// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.0;

/// @title ZkLink interface contract
/// @author zk.link
interface IZkLink {
    /// @notice Send l2 requests sync status to primary chain
    /// @param _newTotalSyncedPriorityTxs New sync point
    function syncL2Requests(uint256 _newTotalSyncedPriorityTxs) external payable;

    /// @notice Receive batch root from primary chain
    /// @param _batchNumber The batch number
    /// @param _l2LogsRootHash The L2 to L1 log root hash
    /// @param _forwardEthAmount The forward eth amount
    function syncBatchRoot(uint256 _batchNumber, bytes32 _l2LogsRootHash, uint256 _forwardEthAmount) external payable;

    /// @notice Receive range batch root hash from primary chain
    /// @param _fromBatchNumber The batch number from
    /// @param _toBatchNumber The batch number to
    /// @param _rangeBatchRootHash The accumulation hash of l2LogsRootHash in the range [`_fromBatchNumber`, `_toBatchNumber`]
    /// @param _forwardEthAmount The forward eth amount
    function syncRangeBatchRoot(
        uint256 _fromBatchNumber,
        uint256 _toBatchNumber,
        bytes32 _rangeBatchRootHash,
        uint256 _forwardEthAmount
    ) external payable;

    /// @notice Receive l2 tx hash from primary chain
    /// @param _l2TxHash The l2 tx hash on local chain
    /// @param _primaryChainL2TxHash The l2 tx hash on primary chain
    function syncL2TxHash(bytes32 _l2TxHash, bytes32 _primaryChainL2TxHash) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @dev The address of the L2 deployer system contract.
address constant L2_DEPLOYER_SYSTEM_CONTRACT_ADDR = address(0x8006);

/// @dev The special reserved L2 address. It is located in the system contracts space but doesn't have deployed
/// bytecode.
/// @dev The L2 deployer system contract allows changing bytecodes on any address if the `msg.sender` is this address.
/// @dev So, whenever the governor wants to redeploy system contracts, it just initiates the L1 upgrade call deployer
/// system contract
/// via the L1 -> L2 transaction with `sender == L2_FORCE_DEPLOYER_ADDR`. For more details see the
/// `diamond-initializers` contracts.
address constant L2_FORCE_DEPLOYER_ADDR = address(0x8007);

/// @dev The address of the special smart contract that can send arbitrary length message as an L2 log
address constant L2_TO_L1_MESSENGER_SYSTEM_CONTRACT_ADDR = address(0x8008);

/// @dev The formal address of the initial program of the system: the bootloader
address constant L2_BOOTLOADER_ADDRESS = address(0x8001);

/// @dev The address of the eth token system contract
address constant L2_ETH_TOKEN_SYSTEM_CONTRACT_ADDR = address(0x800a);

/// @dev The address of the known code storage system contract
address constant L2_KNOWN_CODE_STORAGE_SYSTEM_CONTRACT_ADDR = address(0x8004);

/// @dev The address of the context system contract
address constant L2_SYSTEM_CONTEXT_SYSTEM_CONTRACT_ADDR = address(0x800b);

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @author Matter Labs
 * @custom:security-contact [email protected]
 * @notice The library for unchecked math.
 */
library UncheckedMath {
    function uncheckedInc(uint256 _number) internal pure returns (uint256) {
        unchecked {
            return _number + 1;
        }
    }

    function uncheckedAdd(uint256 _lhs, uint256 _rhs) internal pure returns (uint256) {
        unchecked {
            return _lhs + _rhs;
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @author Matter Labs
 * @custom:security-contact [email protected]
 * @dev The library provides a set of functions that help read data from an "abi.encodePacked" byte array.
 * @dev Each of the functions accepts the `bytes memory` and the offset where data should be read and returns a value of a certain type.
 *
 * @dev WARNING!
 * 1) Functions don't check the length of the bytes array, so it can go out of bounds.
 * The user of the library must check for bytes length before using any functions from the library!
 *
 * 2) Read variables are not cleaned up - https://docs.soliditylang.org/en/v0.8.16/internals/variable_cleanup.html.
 * Using data in inline assembly can lead to unexpected behavior!
 */
library UnsafeBytes {
    function readUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32 result, uint256 offset) {
        assembly {
            offset := add(_start, 4)
            result := mload(add(_bytes, offset))
        }
    }

    function readAddress(bytes memory _bytes, uint256 _start) internal pure returns (address result, uint256 offset) {
        assembly {
            offset := add(_start, 20)
            result := mload(add(_bytes, offset))
        }
    }

    function readUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256 result, uint256 offset) {
        assembly {
            offset := add(_start, 32)
            result := mload(add(_bytes, offset))
        }
    }

    function readBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32 result, uint256 offset) {
        assembly {
            offset := add(_start, 32)
            result := mload(add(_bytes, offset))
        }
    }

    // Original source code: https://github.com/GNSPS/solidity-bytes-utils/blob/master/contracts/BytesLib.sol#L228
    // Get slice from bytes arrays
    // Returns the newly created 'bytes memory'
    // NOTE: theoretically possible overflow of (_start + _length)
    function slice(bytes memory _bytes, uint256 _start, uint256 _length) internal pure returns (bytes memory) {
        require(_bytes.length >= (_start + _length), "Z"); // bytes length is less then start byte + length bytes

        bytes memory tempBytes = new bytes(_length);

        if (_length != 0) {
            assembly {
                let slice_curr := add(tempBytes, 0x20)
                let slice_end := add(slice_curr, _length)

                for {
                    let array_current := add(_bytes, add(_start, 0x20))
                } lt(slice_curr, slice_end) {
                    slice_curr := add(slice_curr, 0x20)
                    array_current := add(array_current, 0x20)
                } {
                    mstore(slice_curr, mload(array_current))
                }
            }
        }

        return tempBytes;
    }
}

// SPDX-License-Identifier: Apache-2.0

/*
 * Copyright 2019-2021, Offchain Labs, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

pragma solidity ^0.8.0;

library AddressAliasHelper {
    uint160 internal constant OFFSET = uint160(0x1111000000000000000000000000000000001111);

    /// @notice Utility function converts the address that submitted a tx
    /// to the inbox on L1 to the msg.sender viewed on L2
    /// @param l1Address the address in the L1 that triggered the tx to L2
    /// @return l2Address L2 address as viewed in msg.sender
    function applyL1ToL2Alias(address l1Address) internal pure returns (address l2Address) {
        unchecked {
            l2Address = address(uint160(l1Address) + OFFSET);
        }
    }

    /// @notice Utility function that converts the msg.sender viewed on L2 to the
    /// address that submitted a tx to the inbox on L1
    /// @param l2Address L2 address as viewed in msg.sender
    /// @return l1Address the address in the L1 that triggered the tx to L2
    function undoL1ToL2Alias(address l2Address) internal pure returns (address l1Address) {
        unchecked {
            l1Address = address(uint160(l2Address) - OFFSET);
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @dev `keccak256("")`
bytes32 constant EMPTY_STRING_KECCAK = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;

/// @dev Bytes in raw L2 log
/// @dev Equal to the bytes size of the tuple - (uint8 ShardId, bool isService, uint16 txNumberInBatch, address sender,
/// bytes32 key, bytes32 value)
uint256 constant L2_TO_L1_LOG_SERIALIZE_SIZE = 88;

/// @dev The maximum length of the bytes array with L2 -> L1 logs
uint256 constant MAX_L2_TO_L1_LOGS_COMMITMENT_BYTES = 4 + L2_TO_L1_LOG_SERIALIZE_SIZE * 512;

/// @dev The value of default leaf hash for L2 -> L1 logs Merkle tree
/// @dev An incomplete fixed-size tree is filled with this value to be a full binary tree
/// @dev Actually equal to the `keccak256(new bytes(L2_TO_L1_LOG_SERIALIZE_SIZE))`
bytes32 constant L2_L1_LOGS_TREE_DEFAULT_LEAF_HASH = 0x72abee45b59e344af8a6e520241c4744aff26ed411f4c4b00f8af09adada43ba;

// TODO: change constant to the real root hash of empty Merkle tree (SMA-184)
bytes32 constant DEFAULT_L2_LOGS_TREE_ROOT_HASH = bytes32(0);

/// @dev Denotes the type of the zkSync transaction that came from L1.
uint256 constant PRIORITY_OPERATION_L2_TX_TYPE = 255;

/// @dev Denotes the type of the zkSync transaction that is used for system upgrades.
uint256 constant SYSTEM_UPGRADE_L2_TX_TYPE = 254;

/// @dev The maximal allowed difference between protocol versions in an upgrade. The 100 gap is needed
/// in case a protocol version has been tested on testnet, but then not launched on mainnet, e.g.
/// due to a bug found.
uint256 constant MAX_ALLOWED_PROTOCOL_VERSION_DELTA = 100;

/// @dev The amount of time in seconds the validator has to process the priority transaction
/// NOTE: The constant is set to zero for the Alpha release period
uint256 constant PRIORITY_EXPIRATION = 0 days;

/// @dev Timestamp - seconds since unix epoch.
uint256 constant COMMIT_TIMESTAMP_NOT_OLDER = 3 days;

/// @dev Maximum available error between real commit batch timestamp and analog used in the verifier (in seconds)
/// @dev Must be used cause miner's `block.timestamp` value can differ on some small value (as we know - 12 seconds)
uint256 constant COMMIT_TIMESTAMP_APPROXIMATION_DELTA = 1 hours;

/// @dev Shift to apply to verify public input before verifying.
uint256 constant PUBLIC_INPUT_SHIFT = 32;

/// @dev The maximum number of L2 gas that a user can request for an L2 transaction
uint256 constant MAX_GAS_PER_TRANSACTION = 80000000;

/// @dev Even though the price for 1 byte of pubdata is 16 L1 gas, we have a slightly increased
/// value.
uint256 constant L1_GAS_PER_PUBDATA_BYTE = 17;

/// @dev The intrinsic cost of the L1->l2 transaction in computational L2 gas
uint256 constant L1_TX_INTRINSIC_L2_GAS = 167157;

/// @dev The intrinsic cost of the L1->l2 transaction in pubdata
uint256 constant L1_TX_INTRINSIC_PUBDATA = 88;

/// @dev The minimal base price for L1 transaction
uint256 constant L1_TX_MIN_L2_GAS_BASE = 173484;

/// @dev The number of L2 gas the transaction starts costing more with each 544 bytes of encoding
uint256 constant L1_TX_DELTA_544_ENCODING_BYTES = 1656;

/// @dev The number of L2 gas an L1->L2 transaction gains with each new factory dependency
uint256 constant L1_TX_DELTA_FACTORY_DEPS_L2_GAS = 2473;

/// @dev The number of L2 gas an L1->L2 transaction gains with each new factory dependency
uint256 constant L1_TX_DELTA_FACTORY_DEPS_PUBDATA = 64;

/// @dev The number of pubdata an L1->L2 transaction requires with each new factory dependency
uint256 constant MAX_NEW_FACTORY_DEPS = 32;

/// @dev The L2 gasPricePerPubdata required to be used in bridges.
uint256 constant REQUIRED_L2_GAS_PRICE_PER_PUBDATA = 800;

/// @dev The mask which should be applied to the packed batch and L2 block timestamp in order
/// to obtain the L2 block timestamp. Applying this mask is equivalent to calculating modulo 2**128
uint256 constant PACKED_L2_BLOCK_TIMESTAMP_MASK = 0xffffffffffffffffffffffffffffffff;

/// @dev The overhead for a transaction slot in L2 gas.
/// It is roughly equal to 80kk/MAX_TRANSACTIONS_IN_BATCH, i.e. how many gas would an L1->L2 transaction
/// need to pay to compensate for the batch being closed.
/// @dev It is expected that the L1 contracts will enforce that the L2 gas price will be high enough to compensate
/// the operator in case the batch is closed because of tx slots filling up.
uint256 constant TX_SLOT_OVERHEAD_L2_GAS = 10000;

/// @dev The overhead for each byte of the bootloader memory that the encoding of the transaction.
/// It is roughly equal to 80kk/BOOTLOADER_MEMORY_FOR_TXS, i.e. how many gas would an L1->L2 transaction
/// need to pay to compensate for the batch being closed.
/// @dev It is expected that the L1 contracts will enforce that the L2 gas price will be high enough to compensate
/// the operator in case the batch is closed because of the memory for transactions being filled up.
uint256 constant MEMORY_OVERHEAD_GAS = 10;

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import {FeeParams} from "../Storage.sol";
import {IL2Gateway} from "../../../../interfaces/IL2Gateway.sol";

/// @title The interface of the Admin Contract that controls access rights for contract management.
/// @author Matter Labs
/// @custom:security-contact [email protected]
interface IAdmin {
    /// @notice Init gateway
    /// @param _gateway The gateway on local chain
    function setGateway(IL2Gateway _gateway) external;

    /// @notice Change validator status (active or not active)
    /// @param _validator Validator address
    /// @param _active Active flag
    function setValidator(address _validator, bool _active) external;

    /// @notice Change the fee params for L1->L2 transactions
    /// @param _newFeeParams The new fee params
    function changeFeeParams(FeeParams calldata _newFeeParams) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import {IL2Gateway} from "../../../../interfaces/IL2Gateway.sol";

/// @title The interface of the Getters Contract that implements functions for getting contract state from outside the blockchain.
/// @author Matter Labs
/// @custom:security-contact [email protected]
interface IGetters {
    /*//////////////////////////////////////////////////////////////
                            CUSTOM GETTERS
    //////////////////////////////////////////////////////////////*/

    /// @return The gateway on local chain
    function getGateway() external view returns (IL2Gateway);

    /// @return The address of the current governor
    function getGovernor() external view returns (address);

    /// @return The total number of batches that were committed & verified & executed
    function getTotalBatchesExecuted() external view returns (uint256);

    /// @return The total number of priority operations that were added to the priority queue, including all processed ones
    function getTotalPriorityTxs() external view returns (uint256);

    /// @return Whether the address has a validator access
    function isValidator(address _address) external view returns (bool);

    /// @return merkleRoot Merkle root of the tree with L2 logs for the selected batch
    function l2LogsRootHash(uint256 _batchNumber) external view returns (bytes32 merkleRoot);

    /// @return The maximum number of L2 gas that a user can request for L1 -> L2 transactions
    function getPriorityTxMaxGasLimit() external view returns (uint256);

    /// @return Whether a withdrawal has been finalized.
    /// @param _l2BatchNumber The L2 batch number within which the withdrawal happened.
    /// @param _l2MessageIndex The index of the L2->L1 message denoting the withdrawal.
    function isEthWithdrawalFinalized(uint256 _l2BatchNumber, uint256 _l2MessageIndex) external view returns (bool);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import {L2Message} from "../Storage.sol";

/// @dev The enum that represents the transaction execution status
/// @param Failure The transaction execution failed
/// @param Success The transaction execution succeeded
enum TxStatus {
    Failure,
    Success
}

/// @title The interface of the zkSync Mailbox contract that provides interfaces for L1 <-> L2 interaction.
/// @author Matter Labs
/// @custom:security-contact [email protected]
interface IMailbox {
    /// @dev Structure that includes all fields of the L2 transaction
    /// @dev The hash of this structure is the "canonical L2 transaction hash" and can be used as a unique identifier of a tx
    /// @param txType The tx type number, depending on which the L2 transaction can be interpreted differently
    /// @param from The sender's address. `uint256` type for possible address format changes and maintaining backward compatibility
    /// @param to The recipient's address. `uint256` type for possible address format changes and maintaining backward compatibility
    /// @param gasLimit The L2 gas limit for L2 transaction. Analog to the `gasLimit` on an L1 transactions
    /// @param gasPerPubdataByteLimit Maximum number of L2 gas that will cost one byte of pubdata (every piece of data that will be stored on L1 as calldata)
    /// @param maxFeePerGas The absolute maximum sender willing to pay per unit of L2 gas to get the transaction included in a batch. Analog to the EIP-1559 `maxFeePerGas` on an L1 transactions
    /// @param maxPriorityFeePerGas The additional fee that is paid directly to the validator to incentivize them to include the transaction in a batch. Analog to the EIP-1559 `maxPriorityFeePerGas` on an L1 transactions
    /// @param paymaster The address of the EIP-4337 paymaster, that will pay fees for the transaction. `uint256` type for possible address format changes and maintaining backward compatibility
    /// @param nonce The nonce of the transaction. For L1->L2 transactions it is the priority operation Id.
    /// @param value The value to pass with the transaction
    /// @param reserved The fixed-length fields for usage in a future extension of transaction formats
    /// @param data The calldata that is transmitted for the transaction call
    /// @param signature An abstract set of bytes that are used for transaction authorization
    /// @param factoryDeps The set of L2 bytecode hashes whose preimages were shown on L1
    /// @param paymasterInput The arbitrary-length data that is used as a calldata to the paymaster pre-call
    /// @param reservedDynamic The arbitrary-length field for usage in a future extension of transaction formats
    struct L2CanonicalTransaction {
        uint256 txType;
        uint256 from;
        uint256 to;
        uint256 gasLimit;
        uint256 gasPerPubdataByteLimit;
        uint256 maxFeePerGas;
        uint256 maxPriorityFeePerGas;
        uint256 paymaster;
        uint256 nonce;
        uint256 value;
        // In the future, we might want to add some
        // new fields to the struct. The `txData` struct
        // is to be passed to account and any changes to its structure
        // would mean a breaking change to these accounts. To prevent this,
        // we should keep some fields as "reserved".
        // It is also recommended that their length is fixed, since
        // it would allow easier proof integration (in case we will need
        // some special circuit for preprocessing transactions).
        uint256[4] reserved;
        bytes data;
        bytes signature;
        uint256[] factoryDeps;
        bytes paymasterInput;
        // Reserved dynamic type for the future use-case. Using it should be avoided,
        // But it is still here, just in case we want to enable some additional functionality.
        bytes reservedDynamic;
    }

    /// @dev Internal structure that contains the parameters for the forwardRequestL2Transaction
    /// @param gateway The secondary chain gateway;
    /// @param isContractCall It's true when the request come from a contract.
    /// @param sender The sender's address.
    /// @param txId The id of the priority transaction.
    /// @param contractAddressL2 The address of the contract on L2 to call.
    /// @param l2Value The msg.value of the L2 transaction.
    /// @param l2CallData The call data of the L2 transaction.
    /// @param l2GasLimit The limit of the L2 gas for the L2 transaction
    /// @param l2GasPrice The price of the L2 gas in Wei to be used for this transaction.
    /// @param l2GasPricePerPubdata The price for a single pubdata byte in L2 gas.
    /// @param refundRecipient The recipient of the refund for the transaction on L2. If the transaction fails, then
    /// this address will receive the `l2Value`.
    struct ForwardL2Request {
        address gateway;
        bool isContractCall;
        address sender;
        uint256 txId;
        address contractAddressL2;
        uint256 l2Value;
        bytes l2CallData;
        uint256 l2GasLimit;
        uint256 l2GasPricePerPubdata;
        bytes[] factoryDeps;
        address refundRecipient;
    }

    /// @notice Prove that a specific arbitrary-length message was sent in a specific L2 batch number
    /// @param _l2BatchNumber The executed L2 batch number in which the message appeared
    /// @param _index The position in the L2 logs Merkle tree of the l2Log that was sent with the message
    /// @param _message Information about the sent message: sender address, the message itself, tx index in the L2 batch where the message was sent
    /// @param _proof Merkle proof for inclusion of L2 log that was sent with the message
    /// @return Whether the proof is valid
    function proveL2MessageInclusion(
        uint256 _l2BatchNumber,
        uint256 _index,
        L2Message calldata _message,
        bytes32[] calldata _proof
    ) external view returns (bool);

    /// @notice Prove that the L1 -> L2 transaction was processed with the specified status.
    /// @param _l2TxHash The L2 canonical transaction hash
    /// @param _l2BatchNumber The L2 batch number where the transaction was processed
    /// @param _l2MessageIndex The position in the L2 logs Merkle tree of the l2Log that was sent with the message
    /// @param _l2TxNumberInBatch The L2 transaction number in the batch, in which the log was sent
    /// @param _merkleProof The Merkle proof of the processing L1 -> L2 transaction
    /// @param _status The execution status of the L1 -> L2 transaction (true - success & 0 - fail)
    /// @return Whether the proof is correct and the transaction was actually executed with provided status
    /// NOTE: It may return `false` for incorrect proof, but it doesn't mean that the L1 -> L2 transaction has an opposite status!
    function proveL1ToL2TransactionStatus(
        bytes32 _l2TxHash,
        uint256 _l2BatchNumber,
        uint256 _l2MessageIndex,
        uint16 _l2TxNumberInBatch,
        bytes32[] calldata _merkleProof,
        TxStatus _status
    ) external view returns (bool);

    /// @notice Request execution of L2 transaction from L1.
    /// @param _contractL2 The L2 receiver address
    /// @param _l2Value `msg.value` of L2 transaction
    /// @param _calldata The input of the L2 transaction
    /// @param _l2GasLimit Maximum amount of L2 gas that transaction can consume during execution on L2
    /// @param _l2GasPerPubdataByteLimit The maximum amount L2 gas that the operator may charge the user for single byte of pubdata.
    /// @param _factoryDeps An array of L2 bytecodes that will be marked as known on L2
    /// @param _refundRecipient The address on L2 that will receive the refund for the transaction.
    /// @dev If the L2 deposit finalization transaction fails, the `_refundRecipient` will receive the `_l2Value`.
    /// Please note, the contract may change the refund recipient's address to eliminate sending funds to addresses out of control.
    /// - If `_refundRecipient` is a contract on L1, the refund will be sent to the aliased `_refundRecipient`.
    /// - If `_refundRecipient` is set to `address(0)` and the sender has NO deployed bytecode on L1, the refund will be sent to the `msg.sender` address.
    /// - If `_refundRecipient` is set to `address(0)` and the sender has deployed bytecode on L1, the refund will be sent to the aliased `msg.sender` address.
    /// @dev The address aliasing of L1 contracts as refund recipient on L2 is necessary to guarantee that the funds are controllable,
    /// since address aliasing to the from address for the L2 tx will be applied if the L1 `msg.sender` is a contract.
    /// Without address aliasing for L1 contracts as refund recipients they would not be able to make proper L2 tx requests
    /// through the Mailbox to use or withdraw the funds from L2, and the funds would be lost.
    /// @return canonicalTxHash The hash of the requested L2 transaction. This hash can be used to follow the transaction status
    function requestL2Transaction(
        address _contractL2,
        uint256 _l2Value,
        bytes calldata _calldata,
        uint256 _l2GasLimit,
        uint256 _l2GasPerPubdataByteLimit,
        bytes[] calldata _factoryDeps,
        address _refundRecipient
    ) external payable returns (bytes32 canonicalTxHash);

    /// @notice Finalize the withdrawal and release funds
    /// @param _l2BatchNumber The L2 batch number where the withdrawal was processed
    /// @param _l2MessageIndex The position in the L2 logs Merkle tree of the l2Log that was sent with the message
    /// @param _l2TxNumberInBatch The L2 transaction number in a batch, in which the log was sent
    /// @param _message The L2 withdraw data, stored in an L2 -> L1 message
    /// @param _merkleProof The Merkle proof of the inclusion L2 -> L1 message about withdrawal initialization
    function finalizeEthWithdrawal(
        uint256 _l2BatchNumber,
        uint256 _l2MessageIndex,
        uint16 _l2TxNumberInBatch,
        bytes calldata _message,
        bytes32[] calldata _merkleProof
    ) external;

    /// @notice Estimates the cost in Ether of requesting execution of an L2 transaction from L1
    /// @param _gasPrice expected L1 gas price at which the user requests the transaction execution
    /// @param _l2GasLimit Maximum amount of L2 gas that transaction can consume during execution on L2
    /// @param _l2GasPerPubdataByteLimit The maximum amount of L2 gas that the operator may charge the user for a single byte of pubdata.
    /// @return The estimated ETH spent on L2 gas for the transaction
    function l2TransactionBaseCost(
        uint256 _gasPrice,
        uint256 _l2GasLimit,
        uint256 _l2GasPerPubdataByteLimit
    ) external view returns (uint256);
}

// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.0;

interface IZkSync {
    /// @notice Update secondary chain status
    /// @param _gateway The secondary chain gateway
    /// @param _active Active flag
    function setSecondaryChainGateway(address _gateway, bool _active) external;

    /// @notice Receive sync status from secondary chain
    /// @param _secondaryChainGateway The secondary chain gateway address
    /// @param _newTotalSyncedPriorityTxs New sync point
    /// @param _syncHash New sync hash
    /// @param _forwardEthAmount The difference eth amount between two sync points
    function syncL2Requests(
        address _secondaryChainGateway,
        uint256 _newTotalSyncedPriorityTxs,
        bytes32 _syncHash,
        uint256 _forwardEthAmount
    ) external payable;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import {UncheckedMath} from "../../common/libraries/UncheckedMath.sol";

/// @author Matter Labs
/// @custom:security-contact [email protected]
library Merkle {
    using UncheckedMath for uint256;

    /// @dev Calculate Merkle root by the provided Merkle proof.
    /// NOTE: When using this function, check that the _path length is equal to the tree height to prevent shorter/longer paths attack
    /// @param _path Merkle path from the leaf to the root
    /// @param _index Leaf index in the tree
    /// @param _itemHash Hash of leaf content
    /// @return The Merkle root
    function calculateRoot(
        bytes32[] calldata _path,
        uint256 _index,
        bytes32 _itemHash
    ) internal pure returns (bytes32) {
        uint256 pathLength = _path.length;
        require(pathLength > 0, "xc");
        require(pathLength < 256, "bt");
        require(_index < (1 << pathLength), "px");

        bytes32 currentHash = _itemHash;
        for (uint256 i; i < pathLength; i = i.uncheckedInc()) {
            currentHash = (_index % 2 == 0)
                ? _efficientHash(currentHash, _path[i])
                : _efficientHash(_path[i], currentHash);
            _index /= 2;
        }

        return currentHash;
    }

    /// @dev Keccak hash of the concatenation of two 32-byte words
    function _efficientHash(bytes32 _lhs, bytes32 _rhs) internal pure returns (bytes32 result) {
        assembly {
            mstore(0x00, _lhs)
            mstore(0x20, _rhs)
            result := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";

import {IMailbox} from "../interfaces/IMailbox.sol";
import {TX_SLOT_OVERHEAD_L2_GAS, MEMORY_OVERHEAD_GAS, L1_TX_INTRINSIC_L2_GAS, L1_TX_DELTA_544_ENCODING_BYTES, L1_TX_DELTA_FACTORY_DEPS_L2_GAS, L1_TX_MIN_L2_GAS_BASE, L1_TX_INTRINSIC_PUBDATA, L1_TX_DELTA_FACTORY_DEPS_PUBDATA, MAX_GAS_PER_TRANSACTION} from "../Config.sol";

/// @title zkSync Library for validating L1 -> L2 transactions
/// @author Matter Labs
/// @custom:security-contact [email protected]
library TransactionValidator {
    /// @dev Used to validate key properties of an L1->L2 transaction
    /// @param _transaction The transaction to validate
    /// @param _encoded The abi encoded bytes of the transaction
    /// @param _priorityTxMaxGasLimit The max gas limit, generally provided from Storage.sol
    /// @param _priorityTxMaxPubdata The maximal amount of pubdata that a single L1->L2 transaction can emit
    function validateL1ToL2Transaction(
        IMailbox.L2CanonicalTransaction memory _transaction,
        bytes memory _encoded,
        uint256 _priorityTxMaxGasLimit,
        uint256 _priorityTxMaxPubdata
    ) internal pure {
        uint256 l2GasForTxBody = getTransactionBodyGasLimit(_transaction.gasLimit, _encoded.length);

        // Ensuring that the transaction is provable
        require(l2GasForTxBody <= _priorityTxMaxGasLimit, "ui");
        // Ensuring that the transaction cannot output more pubdata than is processable
        require(l2GasForTxBody / _transaction.gasPerPubdataByteLimit <= _priorityTxMaxPubdata, "uk");

        // Ensuring that the transaction covers the minimal costs for its processing:
        // hashing its content, publishing the factory dependencies, etc.
        require(
            getMinimalPriorityTransactionGasLimit(
                _encoded.length,
                _transaction.factoryDeps.length,
                _transaction.gasPerPubdataByteLimit
            ) <= l2GasForTxBody,
            "up"
        );
    }

    /// @dev Used to validate upgrade transactions
    /// @param _transaction The transaction to validate
    function validateUpgradeTransaction(IMailbox.L2CanonicalTransaction memory _transaction) internal pure {
        // Restrict from to be within system contract range (0...2^16 - 1)
        require(_transaction.from <= type(uint16).max, "ua");
        require(_transaction.to <= type(uint160).max, "ub");
        require(_transaction.paymaster == 0, "uc");
        require(_transaction.value == 0, "ud");
        require(_transaction.maxFeePerGas == 0, "uq");
        require(_transaction.maxPriorityFeePerGas == 0, "ux");
        require(_transaction.reserved[0] == 0, "ue");
        require(_transaction.reserved[1] <= type(uint160).max, "uf");
        require(_transaction.reserved[2] == 0, "ug");
        require(_transaction.reserved[3] == 0, "uo");
        require(_transaction.signature.length == 0, "uh");
        require(_transaction.paymasterInput.length == 0, "ul");
        require(_transaction.reservedDynamic.length == 0, "um");
    }

    /// @dev Calculates the approximate minimum gas limit required for executing a priority transaction.
    /// @param _encodingLength The length of the priority transaction encoding in bytes.
    /// @param _numberOfFactoryDependencies The number of new factory dependencies that will be added.
    /// @param _l2GasPricePerPubdata The L2 gas price for publishing the priority transaction on L2.
    /// @return The minimum gas limit required to execute the priority transaction.
    /// Note: The calculation includes the main cost of the priority transaction, however, in reality, the operator can spend a little more gas on overheads.
    function getMinimalPriorityTransactionGasLimit(
        uint256 _encodingLength,
        uint256 _numberOfFactoryDependencies,
        uint256 _l2GasPricePerPubdata
    ) internal pure returns (uint256) {
        uint256 costForComputation;
        {
            // Adding the intrinsic cost for the transaction, i.e. auxiliary prices which cannot be easily accounted for
            costForComputation = L1_TX_INTRINSIC_L2_GAS;

            // Taking into account the hashing costs that depend on the length of the transaction
            // Note that L1_TX_DELTA_544_ENCODING_BYTES is the delta in the price for every 544 bytes of
            // the transaction's encoding. It is taken as LCM between 136 and 32 (the length for each keccak256 round
            // and the size of each new encoding word).
            costForComputation += Math.ceilDiv(_encodingLength * L1_TX_DELTA_544_ENCODING_BYTES, 544);

            // Taking into the account the additional costs of providing new factory dependencies
            costForComputation += _numberOfFactoryDependencies * L1_TX_DELTA_FACTORY_DEPS_L2_GAS;

            // There is a minimal amount of computational L2 gas that the transaction should cover
            costForComputation = Math.max(costForComputation, L1_TX_MIN_L2_GAS_BASE);
        }

        uint256 costForPubdata = 0;
        {
            // Adding the intrinsic cost for the transaction, i.e. auxiliary prices which cannot be easily accounted for
            costForPubdata = L1_TX_INTRINSIC_PUBDATA * _l2GasPricePerPubdata;

            // Taking into the account the additional costs of providing new factory dependencies
            costForPubdata += _numberOfFactoryDependencies * L1_TX_DELTA_FACTORY_DEPS_PUBDATA * _l2GasPricePerPubdata;
        }

        return costForComputation + costForPubdata;
    }

    /// @notice Based on the full L2 gas limit (that includes the batch overhead) and other
    /// properties of the transaction, returns the l2GasLimit for the body of the transaction (the actual execution).
    /// @param _totalGasLimit The L2 gas limit that includes both the overhead for processing the batch
    /// and the L2 gas needed to process the transaction itself (i.e. the actual l2GasLimit that will be used for the transaction).
    /// @param _encodingLength The length of the ABI-encoding of the transaction.
    function getTransactionBodyGasLimit(
        uint256 _totalGasLimit,
        uint256 _encodingLength
    ) internal pure returns (uint256 txBodyGasLimit) {
        uint256 overhead = getOverheadForTransaction(_encodingLength);

        require(_totalGasLimit >= overhead, "my"); // provided gas limit doesn't cover transaction overhead
        unchecked {
            // We enforce the fact that `_totalGasLimit >= overhead` explicitly above.
            txBodyGasLimit = _totalGasLimit - overhead;
        }
    }

    /// @notice Based on the total L2 gas limit and several other parameters of the transaction
    /// returns the part of the L2 gas that will be spent on the batch's overhead.
    /// @dev The details of how this function works can be checked in the documentation
    /// of the fee model of zkSync. The appropriate comments are also present
    /// in the Rust implementation description of function `get_maximal_allowed_overhead`.
    /// @param _encodingLength The length of the binary encoding of the transaction in bytes
    function getOverheadForTransaction(
        uint256 _encodingLength
    ) internal pure returns (uint256 batchOverheadForTransaction) {
        // The overhead from taking up the transaction's slot
        batchOverheadForTransaction = TX_SLOT_OVERHEAD_L2_GAS;

        // The overhead for occupying the bootloader memory can be derived from encoded_len
        uint256 overheadForLength = MEMORY_OVERHEAD_GAS * _encodingLength;
        batchOverheadForTransaction = Math.max(batchOverheadForTransaction, overheadForLength);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @dev The log passed from L2
/// @param l2ShardId The shard identifier, 0 - rollup, 1 - porter. All other values are not used but are reserved for
/// the future
/// @param isService A boolean flag that is part of the log along with `key`, `value`, and `sender` address.
/// This field is required formally but does not have any special meaning.
/// @param txNumberInBatch The L2 transaction number in the batch, in which the log was sent
/// @param sender The L2 address which sent the log
/// @param key The 32 bytes of information that was sent in the log
/// @param value The 32 bytes of information that was sent in the log
// Both `key` and `value` are arbitrary 32-bytes selected by the log sender
struct L2Log {
    uint8 l2ShardId;
    bool isService;
    uint16 txNumberInBatch;
    address sender;
    bytes32 key;
    bytes32 value;
}

/// @dev An arbitrary length message passed from L2
/// @notice Under the hood it is `L2Log` sent from the special system L2 contract
/// @param txNumberInBatch The L2 transaction number in the batch, in which the message was sent
/// @param sender The address of the L2 account from which the message was passed
/// @param data An arbitrary length message
struct L2Message {
    uint16 txNumberInBatch;
    address sender;
    bytes data;
}

/// @notice The struct that describes whether users will be charged for pubdata for L1->L2 transactions.
/// @param Rollup The users are charged for pubdata & it is priced based on the gas price on Ethereum.
/// @param Validium The pubdata is considered free with regard to the L1 gas price.
enum PubdataPricingMode {
    Rollup,
    Validium
}

/// @notice The fee params for L1->L2 transactions for the network.
/// @param pubdataPricingMode How the users will charged for pubdata in L1->L2 transactions.
/// @param batchOverheadL1Gas The amount of L1 gas required to process the batch (except for the calldata).
/// @param maxPubdataPerBatch The maximal number of pubdata that can be emitted per batch.
/// @param priorityTxMaxPubdata The maximal amount of pubdata a priority transaction is allowed to publish.
/// It can be slightly less than maxPubdataPerBatch in order to have some margin for the bootloader execution.
/// @param minimalL2GasPrice The minimal L2 gas price to be used by L1->L2 transactions. It should represent
/// the price that a single unit of compute costs.
struct FeeParams {
    PubdataPricingMode pubdataPricingMode;
    uint32 batchOverheadL1Gas;
    uint32 maxPubdataPerBatch;
    uint32 maxL2GasPerBatch;
    uint32 priorityTxMaxPubdata;
    uint64 minimalL2GasPrice;
}

/// @dev The sync status for priority op of secondary chain
/// @param hash The cumulative canonicalTxHash
/// @param amount The cumulative l2 value
struct SecondaryChainSyncStatus {
    bytes32 hash;
    uint256 amount;
}

{
  "viaIR": true,
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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0000000000000000000000000000000000000000000000000000000000000001

-----Decoded View---------------
Arg [0] : _isEthGasToken (bool): True

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000001